Steel plates are made from continuous casting or initial rolling slabs as raw materials, heated by a stepper heating furnace, and then descaling with high-pressure water before entering the roughing mill. The roughing material is cut into heads, tails, and then enters the finishing mill for computer-controlled rolling. After final rolling, it is cooled by laminar flow (computer-controlled cooling rate) and coiled by a coiler to become straight coils.
Steel plate is a flat steel made by pouring molten steel, cooling it, and pressing it. Steel plates are flat or rectangular, and can be directly rolled or cut from wide steel strips. Steel plate belongs to high-strength steel, with high strength and toughness, good hardenability, no obvious temper brittleness, high fatigue limit and multiple impact resistance after quenching and tempering treatment, and good low-temperature impact toughness.
What are the advantages of wear-resistant steel plates
1. Good impact resistance
Wear resistant composite steel plates are made of tough materials such as low carbon steel, low alloy, stainless steel, etc. The metal material not only has good wear resistance, but also can withstand impacts and wear such as falling from high places during transportation.
2. Good heat resistance
The alloy wear-resistant layer is made by adding alloy materials such as vanadium and molybdenum during the manufacturing process, so it can be used and worn at high temperatures of ≤ 800 ℃. Compared to ordinary carbon steel substrates, which can only be used below 380 ℃, low-alloy heat-resistant steel plates work below 540 ℃. This shows how high the heat resistance coefficient of wear-resistant steel plates is.
3. Good corrosion resistance
Wear resistant steel plates contain a large amount of chromium metal, so they have excellent rust and corrosion resistance. Especially suitable for the use of coal chutes and funnels. Not only is it solid and sturdy, but it can also prevent coal from sticking.
4. Convenient processing performance
Although wear-resistant steel plates are wear-resistant, their plasticity is also very high, and they can be cut, bent, bent, punched, etc. according to the designer's ideas. As long as it is a shape that can be processed by ordinary steel plates, wear-resistant steel plates can also achieve it.
The chemical properties of steel plates are easy to process and can be made into various profiles and plates. Good corrosion resistance. This material is not suitable as a structural material. Through long-term production practice and scientific experiments, people have gradually strengthened steel plates by adding alloying elements and using methods such as heat treatment, resulting in a series of steel plate materials. After a series of experimental modifications, it has become an ideal structural material, widely used in fields such as mechanical manufacturing, transportation machinery, power machinery, and aviation industry. The fuselage and compressor of aircraft are often made of aluminum alloy profiles to reduce their own weight.
What are the precautions when repairing steel plates:
1. Steel plate trimming can be carried out through methods such as the combination of hand hammers and shims, spot welding and drawing with shape repair machines, etc;
2. When using a hand hammer and pad iron for operation, the sound insulation pads on the inner side of the steel plate in many positions of the vehicle must be cleaned during operation, otherwise they will adhere to the pad iron and affect the repair quality;
3. When performing spot welding and drawing operations on damaged areas, the welding current should be minimized as much as possible to prevent excessive welding points and high temperatures;
4. When repairing steel plates, methods that do not shrink or shrink less should be adopted as much as possible. If thermal shrinkage is used, it may change the metal material and damage the original anti-corrosion layer of the steel plate;
5. When the steel plate experiences slight agitation (oil pot), a shim or leveling knife can be used to support the inner side of the part, or a suction cup puller can be used to pull the outer side. Using a rubber hammer to strike the edge or reinforcing rib near the steel plate is a very effective method;
6. When determining the necessity of using the shrinkage method, the deformed area should be brought as close as possible to the original position to avoid additional damage to the already drawn metal;
7. The repair can be solved by adding inner horizontal reinforcement ribs as support. When installing the inner reinforcement ribs, they should be installed in the middle position of other reinforcement ribs as much as possible, and the connection with the ceiling should be glued.
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